|Basic info||Taxonomic history||Classification||Relationships|
|Morphology||Ecology and taphonomy||External Literature Search||Age range and collections|
Merycoidodon (Otarohyus) bullatus
Mammalia - Ungulata - Merycoidodontidae
It was recombined as Eporeodon bullatus by Marsh (1875), Thorpe (1921), Sinclair (1924), Thorpe (1924), Thorpe (1937) and Scott (1940); it was synonymized subjectively with Eucrotaphus jacksoni by Cope (1884) and Lander (1998); it was recombined as Otionohyus (Otarohyus) bullatus by Schultz and Falkenbach (1968); it was recombined as Merycoidodon (Otarohyus) bullatus by Stevens and Stevens (1996); it was recombined as Merycoidodon bullatus by Hay (1902), Ostrander (1985) and Stevens and Stevens (2007).
|Year||Name and author|
|1869||Oreodon bullatus Leidy|
|1875||Eporeodon bullatus Marsh p. 250|
|1884||Eporeodon socialis Marsh|
|1902||Eucrotaphus helenae Douglass p. 265|
|1902||Merycoidodon bullatus Hay|
|1907||Eucrotaphus dickinsonensis Douglass p. 99 figs. Pl. 22|
|1921||Eporeodon bullatus Thorpe p. 104|
|1924||Eporeodon bullatus Sinclair|
|1924||Eporeodon bullatus Thorpe|
|1924||Eporeodon dickinsonensis Thorpe|
|1924||Eporeodon helenae Thorpe|
|1937||Eporeodon bullatus Thorpe p. 65 figs. Figs. 7, 28-30|
|1937||Eporeodon dickinsonensis Thorpe p. 68 figs. Figs. 4, 34; PL IV, figs. 1-3|
|1937||Eporeodon helenae Thorpe p. 69 figs. PI. IV, figs. 4-8|
|1937||Eporeodon socialis Thorpe p. 86 figs. Figs. 46-64, 186} PI. XLII; PI. L, figs. 1-2|
|1940||Eporeodon bullatus Scott p. 678|
|1940||Eporeodon socialis Scott p. 683|
|1940||Eporeodon helenae Scott p. 685|
|1954||Subdesmatochoerus socialis Schultz and Falkenbach p. 221 figs. 18 - 21|
|1968||Merycoidodon (Anomerycoidodon) dani Schultz and Falkenbach p. 75 figs. 4-6, 20-23, 51|
|1968||Merycoidodon (Blickohyus) galushai Schultz and Falkenbach p. 80 figs. 4-6, 52|
|1968||Paramerycoidodon (Barbourochoerus) bacai Schultz and Falkenbach p. 91 figs. 7-9, 52|
|1968||Otionohyus (Otarohyus) bullatus Schultz and Falkenbach p. 118 figs. 11-13, 19-23, 52|
|1968||Otionohyus (Otarohyus) hybridus helenae Schultz and Falkenbach p. 131|
|1968||Genetochoerus (Osbornohyus) norbeckensis Schultz and Falkenbach p. 143 figs. 14-16, 21-23, 52|
|1968||Genetochoerus (Osbornohyus) geygani Schultz and Falkenbach p. 149 figs. 14-16, 19-23|
|1968||Genetochoerus (Osbornohyus) dickinsonensis Schultz and Falkenbach p. 154 figs. Figures 14-16, 19, 20, 22, 52|
|1985||Merycoidodon bullatus Ostrander|
|1996||Merycoidodon (Otarohyus) bullatus Stevens and Stevens p. 523 figs. Figures 2C, 3C; Tables 1-7; Appendix B|
|1998||Eucrotaphus galushai Lander|
|2007||Merycoidodon bullatus Stevens and Stevens p. 160|
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
|C. B. Schultz and C. H. Falkenbach 1954 (Subdesmatochoerus socialis)||SKULL: Slightly larger than in holotype of S socialis dakotensis and average examples of Prodesmatochoerus meekae, smaller than in holotype of S. montanus and examples of S. shannonensis; exocc1pital with elongated vacuities smaller than in S. montanus and S. shannonensis; orbit smaller than. in S. shannonensis · paroccipital process wide at base, adhering' to the bulla; bulla well inflated, pit for hyoid attachment more prominent than in S. shannonensis (paroccipital process placed posterior to bulla, differing from S. montanus in which it is more laterally placed).
MANDIBLE: Postsymphysis below anterior portion of P 8 ; ramus of less depth than in the holotype of S. montanus; infenor border of ramus with gradual downward curve; ascending ramus moderately high.
DENTITION: Series slightly larger than in examples of P. meekae; approximately equal to those of S. shannonensis.
LIMBS:More robust and longer than examples of P. meekae.
|M. S. Stevens and J. B. Stevens 1996||The cranial characterization of the species is the same as for the genus-subgenus. Auditory bullae vary from slightly inflated with a moderate hyoidal groove to well inflated with a shallow groove. The Subnasal L. averages 46.5% of the Nasal L. (7 specimens; Appendix B), pl_P4;p1-M 3 averages 49.4% (Table 3), APM3/TM3 ratio averages 1.00 (Table5),APM3/Ht.M3ratioaverages 1.67(Table4), and TM3/Ht. M3 averages 1.66 (Table 6). Merycoi- dodon bullatus differs from Merycoidodon (Merycoido- don) culbertsoni by variously inflated auditory bullae and slightly but significantly broader P.O.C. and higher crowned M3, otherwise similar . Merycoidodon bullatus differs from M. (Otarohyus) major by significantly (except Nasal L.) smaller size, larger and deeper preorbital fossae, less expanded frontals, and smaller auditory bullae with deeper hyoidal grooves.|